Blast raises fears of a deterioration in law and order after Morsi ouster.
New foreign minister says "everything" gets a rethink.
Military dropped flyers urging people to act protect their land and Sinai from "terrorists."
Adly Mansour's first national address comes ahead of protests planned Friday by ousted Muslim Brotherhood.
U.S. secretary of state's will come amidst flaring tension in Syria and Egypt, and his push for a two-state solution is perpetually in the background.
Most senior official to visit Egypt since ouster of Morsi insists Americans want the country's "second chance" at democracy to succeed.
Plunges nation into chaos; dispute centers in part on divisions about the legitimacy of the coup in Egypt.
Hazem el-Beblawi takes P.M. slot; pro-democracy leader Mohamed ElBaradei will be a vice president.
Some members of Congress are looking at withholding some or all of annual $1.5B aid package.
50 Islamist protesters' deaths complicates support of Salafi party for the military coup.